Godiag GD101 J2534 interface allows firmware update online. The recent firmware version V1.8 fix bugs.  2023-03-31 1. Software update to v2.1 2. Firmware update to v1.8 Fix following bugs: 1. J2534 mode J1850 VPW TX message size extended to 4128 bytes 2. ELM327 mode can not be connected by PyOBD 3. ELM327 mode How to Update Godiag J2534 firmware? Download Godiag J2534 firmware update tool here .  Select setup language and install update tool until completed. Connect Godiag j2534 with laptop Check if interface is connected in Device Manager and COM port was set to COM7 Run J1979 Diagnostic Tool on desktop Check Update Press Disconnect button to check new updates Then press Update button Press OK when update is completed. Check current firmware version.